Portable toilet



FIG. 1 is a perspective view of a portable toilet with the door shown in an alternate open position in broken lines for illustrative purposes only and forming no part of the claimed design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a fragmentary perspective view of a portion of the portable toilet. 

The ornamental design for the portable toilet, as shown and described. 